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Isco 4700 Refrigerated Sampler
Section 2 Installation
Figure 2-6
One 20 liter bottle configuration with discharge tube
through the bottle cap
2.5 Attaching the Suction
Line
2-10
The suction line is the tubing from the sampling point to the
pump tube inlet. The sampler uses a
lengths from 3 to 99 feet. Teledyne Isco offers vinyl or FEP-lined
suction lines. The FEP-lined tubing has a polyethylene jacket to
protect it from kinks and abrasions.
The vinyl suction line contains a very low parts-per-million level
of phenols. If phenol content affects your sample analysis, use the
FEP-lined suction line.
Teledyne Isco ships suction line in standard lengths of 3.0 m
(10 ft) or 7.6 m (25 ft). Either length should be cut to the shortest
length feasible for the installation. When installed, the line
should run the shortest possible distance from the collection
point to the pump, preferably with a gradual upward slope.
Excess suction line should be cut, not coiled. Coiled suction line
will hold liquid between sample events which could cross-con-
taminate samples or freeze in cold climates. If the standard
lengths are too short, or if you are cutting compatible
suction line from a bulk spool, you can use lengths up to 30 m
(99 ft).
3
/
-inch ID suction line of
8
3
/
-inch ID
8
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